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A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.

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3 AWG in copper and 2 AWG in aluminum.

Q: What is the required wire size wire for 100 amp service?

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A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.

A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.

Approximate overall diameter of the wire is 12.8 mm. If you are looking for metric wire size 95 mm2. 187500 circular mils.

2 copper

AWG # 4 copper.

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A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.

A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.

Approximate overall diameter of the wire is 12.8 mm. If you are looking for metric wire size 95 mm2. 187500 circular mils.

Service wire for 100 amps requires AWG #3 copper.

I would recommend you use AWG # 2 copper or AWG # 1/0 aluminum for that distance and amperage.

2 copper

2AWG.

AWG # 4 copper.

AWG 4 copper.

For Service Entrance Cable 600 kcmill (Thousands of circular mils).

That can't be answered until you state the voltage.

Assuming its copper. Number #3 or #2 is fine